Business
Loan, savings, investing and planning calculators using standard amortization mathematics, transparent assumptions and cited conventions.
Profit Margin Calculator
Calculate gross profit margin from cost and revenue, and see the matching markup. Clear worked examples and the margin-vs-markup table.
Markup Calculator
Apply a markup percentage to cost to get the selling price, profit and resulting margin. Includes the standard markup-to-margin conversion table.
Break-Even Calculator
Calculate the break-even point in units and revenue from fixed costs, price per unit, and variable cost per unit — plus contribution margin.
Contribution Margin Calculator
Calculate contribution margin and contribution margin ratio from total revenue and variable costs to see what's left to cover fixed costs and profit.
COGS Calculator (Cost of Goods Sold)
Calculate cost of goods sold (COGS), gross profit, and gross margin from beginning inventory, purchases, ending inventory, and revenue.
Business Budget Calculator
Calculate business profit, total expenses, and profit margin from revenue and expense categories — payroll, rent, materials, marketing, and more.
Burn Rate Calculator
Calculate net burn rate, gross burn rate, and implied runway from starting cash, ending cash, elapsed months, and monthly revenue.
Cash Runway Calculator
Calculate cash runway in months and years from your current cash balance and monthly burn rate — see how long your cash will last.
Business Valuation Calculator
Estimate business value using revenue and EBITDA multiples — two common market-based approaches to valuing a private business.
Sales Commission Calculator
Calculate sales commission earned from a sale amount, commission percentage, and optional split percentage between salespeople or channels.
Website Ad Revenue Calculator
Estimate monthly, daily, and annual website ad revenue from pageviews and RPM (revenue per thousand pageviews).
Labor Cost Calculator
Calculate the true monthly and annual cost of an employee: hourly wage plus a burden percentage for taxes, benefits, and insurance, times hours worked.
Revenue per Employee Calculator
Calculate revenue per employee — annual revenue divided by headcount — the standard workforce-productivity ratio, with the monthly equivalent.
Inventory Turnover Calculator
Calculate inventory turnover (COGS ÷ average inventory) and days sales of inventory — how many times a year stock sells through and how long it sits.
EOQ Calculator (Economic Order Quantity)
Calculate the economic order quantity with the Wilson formula √(2DS/H): the order size minimizing ordering plus holding costs, and orders per year.
Cost of Doing Business Calculator
Calculate your cost of doing business: annual overheads plus owner salary spread over billable days, giving the daily and hourly cost you must recover.